update deps & install rector

Behavioral/Command/HelloCommand.php

@@ -8,16 +8,11 @@ namespace DesignPatterns\Behavioral\Command;
  */
 class HelloCommand implements Command
 {
-    /**
-     * @var Receiver
-     */
-    private $output;
+    private Receiver $output;
 
     /**
      * Each concrete command is built with different receivers.
      * There can be one, many or completely no receivers, but there can be other commands in the parameters
-     *
-     * @param Receiver $console
      */
     public function __construct(Receiver $console)
     {